#metabolic pathway
- Aerobiosis — A condition of life or a biochemical process of organisms that can only exist and function in the presence of free molecular oxygen; the assembly of metabolic reactions through which organic substances are fully oxidized, resulting in the production of energy, carbon dioxide, and water. It represents the opposite of anaerobiosis and is specific to the vast majority of complex living beings.
- Aldolase — An enzyme belonging to the lyase class that catalyzes the reversible cleavage of fructose-1,6-bisphosphate into two triose phosphates (glyceraldehyde-3-phosphate and dihydroxyacetone phosphate), a core step in the glycolytic pathway. Clinical measurements of its serum levels are utilized to diagnose acute muscle or hepatic disorders.
- Amylogenic — Stimulating, favoring, or closely linked to the process of starch formation in plant organisms; relating to the property of certain substances or environmental factors to trigger the biosynthesis of complex carbohydrates. This structural attribute is used to describe metabolic pathways or biocatalysts involved in the polymerization of glucose inside plastids.
- Anaerobiotic — Pertaining to anaerobiosis or occurring under conditions completely devoid of oxygen; referring to anoxic metabolisms, organisms, or living environments. In a structural biochemical sense, it qualifies organic substance degradation reactions where the final electron acceptor is not molecular oxygen, but another chemical compound (such as nitrate or sulfate).
- Antiferment — An archaic or historical name used in biochemistry to designate an anti-enzyme or enzyme inhibitor; an organic substance capable of blocking, delaying, or neutralizing the catalytic action of a ferment (enzyme). Broadly, it describes chemical compounds that halt organic decomposition or microbial fermentation processes.
- Arginase — A highly crucial hydrolytic enzyme, primarily located in the cytoplasm of hepatocytes, which catalyzes the final phase of the urea cycle. This structural biocatalyst splits arginine into ornithine and urea, facilitating the efficient elimination of toxic ammonia resulting from protein metabolism and thus preventing severe neurological disorders.
- Aspartic — Containing aspartate or relating to a non-essential dicarboxylic amino acid; used almost exclusively in the phrase 'aspartic acid', a fundamental constituent of human and animal proteins that plays a vital role in the urea cycle, the synthesis of other amino acids, and the proper functioning of the metabolic and nervous systems.